Problem Statement

Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.

Let's start with the solution:

def is-numeric [] {try {into float | true} catch {false}}

["1" "12" "-3" "5.6" "-3.14" "one" "cheese"] | each {{k: $in, v: ($in | is-numeric)}}